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Black Spider With Three Red Dots On Its Back. What Kind Of Spider Is It?

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Jackie Russell Profile
Jackie Russell answered
There are a number of different spiders that could be described as black spiders with a red dot on their back including the Black Widow, the Australian Redback spider and the Jumping Spider.

Black widow spiders are perhaps the best known of the latrodectus genus of spiders. They are fairly dangerous spiders. The female black widow's bite is particularly harmful to humans because of their unusually large venom glands. Not all adult female black widows exhibit the red hourglass on their abdomen, some may instead have a pair of red spots or they may have no marking at all. However any markings that they do have will be bright red. Adult male black widows are about a quarter the size of the female and are normally grey or brown instead of black and red. The bite of a male black widow is not considered to be dangerous to humans.

Alternatively, the description of a black spider with a red spot could also match that of an Australian Redback spider. This is another spider which is extremely dangerous to humans; it is considered one of the most dangerous spiders in its native Australia. The Redback has a neurotoxic venom which is toxic to humans and causes severe pain if someone is bitten by them.

Jumping spiders are a large family of spiders containing over 500 described genera and about 5,000 described species. They make up about 13 per cent of all species of spiders. They come in a variety of colors and patterns but some members of the species are known to be black spiders with red spots. Spiders matching this particular description have been found in Colorado, USA among other places.
Dimitri ...... Profile
Dimitri ...... answered
If the spot on its back is red an is sort of shaped like a hour glass then you have yourself a Black Widow.
Anonymous Profile
Anonymous answered
If it is three linear red dots on the top of the spiders abdomen, then it is a male black widow. They are not as dangerous as the female black widow. But even a females bites' are rarely fatal anyways
Anonymous Profile
Anonymous answered
I also live in Michigan and have seen this same spider.  I would have agreed that is was a black widow except that the red was on the back.  We had 2 of these spiders in our front shrubs for 2 years.  The web was large and the "traditional" octagon shape of most orbital spiders.
Anonymous Profile
Anonymous answered
Sounds like a black widow to me.
Anonymous Profile
Anonymous answered
Its a jumping spider.
thanked the writer.
huang jing
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Anonymous Profile
Anonymous answered
Sounds like a common jumping spider. They are about 1/4' to 3/4" long, fuzzy, and have a red dot on there back.
Anonymous Profile
Anonymous answered
It is not a black widow, black widows are not fuzzy. I have seen the spider you are talking about and it is fuzzy. It is most likely a form of Wolf Spider.
Anonymous Profile
Anonymous answered
I live in michigan ,I just saw a black spider with a single red dot on the back of it , it also had two body parts to it ,it was about 1/2 inch long with eight legs
Anonymous Profile
Anonymous answered
Physically impossible to be a black widow if the red was on the back of the spider. It was more than likely an Australian Redback Spider. Which is from the same family as the Black Widow.

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